diff options
| author | Frederic Weisbecker <fweisbec@gmail.com> | 2008-12-09 23:54:20 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-12 11:14:08 +0100 |
| commit | bcbc4f20b52c2c40c43a4d2337707dcdfe81bc3a (patch) | |
| tree | 897774cc2f53691b2736e3d1dbadc9d1e263d47a /arch/x86 | |
| parent | a0343e823184070f55364d8359f832dcb33c57c7 (diff) | |
| download | op-kernel-dev-bcbc4f20b52c2c40c43a4d2337707dcdfe81bc3a.zip op-kernel-dev-bcbc4f20b52c2c40c43a4d2337707dcdfe81bc3a.tar.gz | |
tracing/function-graph-tracer: annotate do_IRQ and smp_apic_timer_interrupt
Impact: move most important x86 irq entry-points to a separate subsection
Annotate do_IRQ and smp_apic_timer_interrupt to put them into the .irqentry.text
subsection. These function will so be recognized as hardirq entrypoints for the
function-graph-tracer. We could also annotate other irq entries but the others
are far less important but they can be added on request.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/apic.c | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/irq_64.c | 3 |
2 files changed, 4 insertions, 2 deletions
diff --git a/arch/x86/kernel/apic.c b/arch/x86/kernel/apic.c index 16f9487..b946ac1 100644 --- a/arch/x86/kernel/apic.c +++ b/arch/x86/kernel/apic.c @@ -30,6 +30,7 @@ #include <linux/module.h> #include <linux/dmi.h> #include <linux/dmar.h> +#include <linux/ftrace.h> #include <asm/atomic.h> #include <asm/smp.h> @@ -800,7 +801,7 @@ static void local_apic_timer_interrupt(void) * [ if a single-CPU system runs an SMP kernel then we call the local * interrupt as well. Thus we cannot inline the local irq ... ] */ -void smp_apic_timer_interrupt(struct pt_regs *regs) +void __irq_entry smp_apic_timer_interrupt(struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c index 60eb84e..11c65e8 100644 --- a/arch/x86/kernel/irq_64.c +++ b/arch/x86/kernel/irq_64.c @@ -13,6 +13,7 @@ #include <linux/seq_file.h> #include <linux/module.h> #include <linux/delay.h> +#include <linux/ftrace.h> #include <asm/uaccess.h> #include <asm/io_apic.h> #include <asm/idle.h> @@ -47,7 +48,7 @@ static inline void stack_overflow_check(struct pt_regs *regs) * SMP cross-CPU interrupts have their own specific * handlers). */ -asmlinkage unsigned int do_IRQ(struct pt_regs *regs) +asmlinkage unsigned int __irq_entry do_IRQ(struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); struct irq_desc *desc; |
